PHYSA. 149 
27. PHYSA INFLATA, Lea. 
Plate 8, fig. 4. 
Shell inflated, dark, somewhat pellucid; 
spire somewhat elevated, acutely conical ; 
whorls five; outer lip margined and inflated ; 
aperture wide. 
. Length 16, diam. 12 mill. 
Virginia, between the Salt Sulphur and 
Sweet Springs. 
It is perhaps most nearly allied to Ph. hete- 
rostropha, Say, but has a shorter aperture and 
is more inflated.—Lea. 
28. PHYSA FRAGILIS, Mighels. 
Hald. Monog. 31, t. 4, figs. 11—13. 
Shell very thin and fragile, translucent, 
horn-color, obliquely ovate; whorls four; last 
whorl campanulate, suture deeply impressed 
at the enlargement of the last whorl; spire 
(65) 
